Regression test for issue 11023

tests/language/extends_test.dart

+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+library ExtendsTestMain;
+import "extends_test_lib.dart";
+import "package:expect/expect.dart";
+
+// S should extend class A from below, not the one imported
+// from the library.
+class S extends A {
+}
+
+class A {
+  var y = "class A from main script";
+}
+
+main() {
+  var s = new S();
+  Expect.equals("class A from main script", s.y);
+}
+